Zhaoqing Yu, Wei Zhang, He Yang, Shan-Ho Chou, Michael Y Galperin, Jin He
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Gas and light: triggers of c-di-GMP-mediated regulation.
The widespread bacterial second messenger c-di-GMP is responsible for regulating many important physiological functions such as biofilm formation, motility, cell differentiation, and virulence. The synthesis and degradation of c-di-GMP in bacterial cells depend, respectively, on diguanylate cyclases and c-di-GMP-specific phosphodiesterases. Since c-di-GMP metabolic enzymes (CMEs) are often fused to sensory domains, their activities are likely controlled by environmental signals, thereby altering cellular c-di-GMP levels and regulating bacterial adaptive behaviors. Previous studies on c-di-GMP-mediated regulation mainly focused on downstream signaling pathways, including the identification of CMEs, cellular c-di-GMP receptors, and c-di-GMP-regulated processes. The mechanisms of CME regulation by upstream signaling modules received less attention, resulting in a limited understanding of the c-di-GMP regulatory networks. We review here the diversity of sensory domains related to bacterial CME regulation. We specifically discuss those domains that are capable of sensing gaseous or light signals and the mechanisms they use for regulating cellular c-di-GMP levels. It is hoped that this review would help refine the complete c-di-GMP regulatory networks and improve our understanding of bacterial behaviors in changing environments. In practical terms, this may eventually provide a way to control c-di-GMP-mediated bacterial biofilm formation and pathogenesis in general.
期刊介绍:
Title: FEMS Microbiology Reviews
Journal Focus:
Publishes reviews covering all aspects of microbiology not recently surveyed
Reviews topics of current interest
Provides comprehensive, critical, and authoritative coverage
Offers new perspectives and critical, detailed discussions of significant trends
May contain speculative and selective elements
Aimed at both specialists and general readers
Reviews should be framed within the context of general microbiology and biology
Submission Criteria:
Manuscripts should not be unevaluated compilations of literature
Lectures delivered at symposia must review the related field to be acceptable